Properties of La 2 F 4 Se, B-LaFSe phases. Phase diagram of the LaF 3-La 2 Se 3 system

被引：1

作者：

Grigorchenko, V. M. ^{[1
]}

Molokeev, M. S. ^{[1
,2
]}

Yurev, I. O. ^{[1
,4
]}

Aleksandrovsky, A. S. ^{[2
,3
]}

Oreshonkov, A. S. ^{[2
,3
]}

Krylov, A. S. ^{[2
]}

Nesterova, N. V. ^{[1
]}

Kamaev, D. N. ^{[4
]}

Elyshev, A. V. ^{[1
]}

V. Andreev, O. ^{[1
,5
]}

机构：

[1] Tyumen State Univ, Volodarsky Str 6, Tyumen 625003, Russia

[2] Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Akademgorodok Str 50,Bldg 38, Krasnoyarsk 660036, Russia

[3] Siberian Fed Univ, Svobodniy Av 79, Krasnoyarsk 660079, Russia

[4] Kurgan State Univ, Sovetskaya Str 63-4, Kurgan 640020, Russia

[5] Russian Acad Sci, Ural Branch, Inst Solid State Chem, Pervomaiskaya Str 91, Ekaterinburg 620990, Russia

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 2024年 / 338卷

基金：

俄罗斯科学基金会;

关键词：

Lanthanum selenidofluoride; Band gap; Phase diagram; Incongruent melting; CRYSTALLOGRAPHY OPEN DATABASE; OPEN-ACCESS COLLECTION; EQUILIBRIA; LN;

D O I：

10.1016/j.jssc.2024.124880

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Lanthanum selenidofluorides belong to wide-gap semiconductors and are promising for optoelectronics. La 2 F 4 Se, B-LaFSe compounds were obtained by the ampoule method from binary compounds. Crystals La 2 F 4 Se, R-3 m , a = 4.18245(11) & Aring;, c = 23.2939(6) & Aring;, Z = 3, B-LaFSe P 6 3 / mmc , a = 4.21989(5) & Aring;, c = 8.19140(10) & Aring;, Z = 2 have a layered grain structure, their microhardnesses are 340 and 450 HV, which allows samples processing. The optical bandgap of La 2 F 4 Se is 4.5 eV. The optical bandgaps of La 2 F 4 Se and B-LaFSe were analyzed by comparing the calculated absorption spectra and the experimental Kubelka-Munk Functions. It was shown that this approach is attractive in explaining optical properties in the vicinity of fundamental absorption onset and in neighboring regions. In LaF 3 - La 2 Se 3 system, temperatures and enthalpies of five phase transformations were determined, and their balance equations were obtained. It was shown that La 2 F 4 Se, B-LaFSe compounds melt incongruently and that an eutectic is formed between the phases. A phase diagram of LaF 3 - La 2 Se 3 system was constructed. The liquidus calculated by Redlich-Kister polynomial agrees with the data of differential scanning calorimetry.

引用

页数：10

共 46 条

[1] Properties of GdSF and phase diagram of the GdF3-Gd2S3 system [J].

Abulkhaev, M. U. ;

Molokeev, M. S. ;

Oreshonkov, A. S. ;

Aleksandrovsky, A. S. ;

Kertman, A. V. ;

Kamaev, D. N. ;

Trofimova, O. V. ;

Elyshev, A. V. ;

Andreev, O. V. .

JOURNAL OF SOLID STATE CHEMISTRY, 2023, 322

[2] Phase equilibria laws in the SrS-Ln2S3 (Ln = Yb-Lu, Y, or Sc) systems [J].

Andreev, O. V. ;

Mitroshin, O. Yu. ;

Khritokhin, N. A. ;

Razumkova, I. A. .

RUSSIAN JOURNAL OF INORGANIC CHEMISTRY, 2008, 53 (03) :440-445

[3] Phase equilibria in the Sc2S3-Ln2S3 (Ln = Dy, Er, or Tm) systems [J].

Andreev, O. V. ;

Mitroshin, O. Yu. ;

Razumkova, I. A. .

RUSSIAN JOURNAL OF INORGANIC CHEMISTRY, 2008, 53 (02) :323-326

[4] Phase diagram of the Y-Y2Se3 system, enthalpies of phase transformations [J].

Andreev, O. V. ;

Kharitontsev, V. B. ;

Polkovnikov, A. A. ;

Elyshev, A. V. ;

Andreev, P. O. .

JOURNAL OF SOLID STATE CHEMISTRY, 2015, 230 :186-190

[5] Synthesis, Structure, and Properties of EuLnCuSe3 (Ln = Nd, Sm, Gd, Er) [J].

Andreev, Oleg V. ;

Atuchin, Victor V. ;

Aleksandrovsky, Alexander S. ;

Denisenko, Yuriy G. ;

Zakharov, Boris A. ;

Tyutyunnik, Alexander P. ;

Habibullayev, Navruzbek N. ;

Velikanov, Dmitriy A. ;

Ulybin, Dmitriy A. ;

Shpindyuk, Daniil D. .

CRYSTALS, 2022, 12 (01)

[6] Temperatures and enthalpies of melting of Ln2S3 (Ln = Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu) compounds [J].

Andreev, Petr O. ;

Polkovnikov, Aleksei A. ;

Denisenko, Yuriy G. ;

Andreev, Oleg V. ;

Burkhanova, Tatyana M. ;

Bobylevb, Andrey N. ;

Pimneva, Ludmila A. .

JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY, 2018, 131 (02) :1545-1551

[7]

[Anonymous], 2008, BRUK AXS TOPAS V4 GE

[8] Doping Induced Polymorph and Carrier Polarity Changes in LaSeF [J].

Arai, Takeshi ;

Limura, Soshi ;

Hosono, Hideo .

CHEMISTRY OF MATERIALS, 2018, 30 (03) :597-601

[9]

Atherton M.J., 1979, ADV INORG CHEM, V22, P171

[10] Crystal-Structure Prediction and Experimental Investigation of the Polymorphic Lanthanum Fluoride Selenides LaFSe and La2F4Se [J].

Buyer, Constantin ;

Grossholz, Hagen ;

Wolf, Sarah ;

Zagorac, Dejan ;

Zagorac, Jelena ;

Schoen, J. Christian ;

Schleid, Thomas .

CRYSTAL GROWTH & DESIGN, 2022, 22 (12) :7133-7142

← 1 2 3 4 5 →